All I know is 100% silicone is recommended Tim. I'm sure I could get away with many of the readily available silicon based sealants but thought I'd buck the odds by using the tried and tested stuff from the experts. Will advise what it is.
Richard
2018 Roadster 3.7 1966 Land Rover S2a 88 2024 Royal Enfield Guerrilla 450 1945 Guzzi Airone